That fixed it, thanks! So in retrospect, I think the documentation could be improved a bit, especially in two areas:
1) When you display the two commands used to install the software on the Pi (or whatever remote device you have, Arduino etc...), this should emphasize that the name of the file to wget is specific to that cayenne web page cloud server connection, and that previously installed bits using a previous web page cloud connection will not work. In fact, if you have previously installed the software and are re-installing it, then you should un-install it first and then use the commands shown with the very specific file name to install. (and provide a link for un-install process).
2 Currently the web page tells you to issue the wget download and install instructions on the remote device (Pi in my case). But then it doesn't say anything else. My reaction was OK, now what? It should say something on the web page about needing to keep the page active, do not leave the page etc. and wait till the software installs on the remote device and it reboots, then syncs up with the cloud. This can take several minutes. I was left with the feeling that nothing was happening, closed the web page, re-entered it (which provided me with a new wget filename but I didn't catch that - after all, I had already installed the software so I could "ignore" that step!
BTW, you're probably thinking how dumb can this guy be. All I can tell you is that I have over 30 years as a Unix Systems Administrator under my belt. I'm not a total ignoramus. But quite frankly, the poor documentation especially during the initial install phase of the software left me hanging in the breeze. Now I'm sure I'll get flamed here as a total idiot but that's life. We all make mistakes. Again, thanks for the prompt reply and accurate diagnosis of what was probably wrong and how to fix it.